Carboxylic acids and derivatives (A-level only)

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Question 14
Medium

This question is about esters.

The figure below shows an incomplete mechanism for the reaction of methyl propanoate with aqueous sodium hydroxide.

Incomplete mechanism for the alkaline hydrolysis of methyl propanoate with aqueous sodium hydroxide

a.

Identify where three additional curly arrows are required to complete the steps of the mechanism. Describe each missing arrow's starting position and destination.

[3]
b.

Name the type of reaction shown.

[1]
c.

Deduce the role of the CH3O−\text{CH}_3\text{O}^-CH3​O− ion in step 3.

[1]
d.

A triester in vegetable oil reacts with sodium hydroxide in a similar way. Give a common use for the sodium salt product of this reaction.

[1]

Carboxylic acids and derivatives (A-level only) Questions

  1. A Level
  2. /Chemistry
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